The perimeter of the parallelogram is 29 m and one of its sides is 9 m, find the other side.

Let’s denote by x the length of the other side of this parallelogram.
According to the condition of the problem, the first side of this parallelogram is 9 m, and the perimeter of this parallelogram is 29 m, therefore, the following relation holds:
2 * (9 + x) = 29.
We solve the resulting equation and find the length of the second side of this parallelogram:
9 + x = 29/2;
9 + x = 14.5;
x = 14.5 – 9;
x = 5.5 m.

Answer: the length of the second side of this parallelogram is 5.5 m.